.308 grouping problem

I don't know where to go with reloading right now. I have tried several different loads and none seem to group well at all. I have tried 45.5 grains varget with a 168 grain Berger Nosler brass and I am all over the place. I have tried 155 grain Bergers with 47 grains varget and it's all over the place. The best group I cam get which still isn't that good is about a 1.5 inch at 100 yards with a 165 grain Nosler ballistic tip and 45.5 grains varget. Where to go from here???????

It may not be your reloads. Will the gun shoot tight groups with anything?

Go buy a factory box of Federal Gold Medal Match bullets with the 168 gr. Sierra Match King Bullets. Shoot some groups with these bullets. If they don't group close to one hole groups, the problem probably isn't your reloads.